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The diagram shows two right-angled triangles ABD and BCD, sharing a common side BD.

AD = 10cm, BC = 12cm and angle DBC = 60°.

Work out the length of AB.

**Question**

11) The diagram shows two right-angled triangles ABD and BCD, sharing a common side BD.

AD = 10cm, BC = 12cm and angle DBC = 60°.

AD = 10cm, BC = 12cm and angle DBC = 60°.

Work out the length of AB.

**[6 marks]**